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Analysing extraction uniformity from porous coffee beds using mathematical modelling and computational fluid dynamics approaches

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dc.contributor.author Moroney, Kevin M.
dc.contributor.author O’Connell, Ken
dc.contributor.author Meikle-Janney, Paul
dc.contributor.author O’Brien, Stephen B.G.
dc.contributor.author Walker, Gavin M.
dc.contributor.author Lee, William T.
dc.date.accessioned 2019-09-03T08:52:10Z
dc.date.available 2019-09-03T08:52:10Z
dc.date.issued 2019
dc.identifier.uri http://hdl.handle.net/10344/8010
dc.description peer-reviewed en_US
dc.description.abstract Achieving a uniform extraction of soluble material from a porous matrix is a generic problem in various separation and filtration operations, with applications in the food processing, chemical and pharmaceutical industries. This paper describes models of fluid flow and transport of soluble material within a packed granular bed in the context of coffee extraction. Coffee extraction is described by diffusion of soluble material from particles of one or more representative sizes into fluid flowing through the packed bed. One-dimensional flow models are compared to computational fluid dynamics (CFD) models. A fine and a coarse coffee grind are considered. Model results are compared to experimental data for a packed cylindrical coffee bed and the influence of a change in geometry to a truncated cone is considered. Non-uniform flow in the truncated cone causes significant variation in the local extraction level. Coffee extraction levels during brewing are analysed using extraction maps and the degree of variation is represented on the industry standard coffee brewing contro lchart. A high variation in extraction yield can be expected to impart bitter flavours into the brew and thus is an important variable to quantify en_US
dc.language.iso eng en_US
dc.publisher Public Library of Science en_US
dc.relation.ispartofseries PLoS ONE;
dc.subject coffee beds en_US
dc.subject flavours en_US
dc.subject truncated cone en_US
dc.subject fluid flow en_US
dc.title Analysing extraction uniformity from porous coffee beds using mathematical modelling and computational fluid dynamics approaches en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1371/journal.pone.0219906
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor ERC en_US
dc.relation.projectid 14/SP/2750. en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2924354
dc.terms.accessRights Unrestricted online access


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